Why String.IndexofAny() is working differently in Framework 4.6 from .NET50

Question

I have to return the text based on the input format used in formula. So, When I used to check String.IndexofAny() in Framework 4.6 it returns -1 even if the character is present.

Example : Formula : =TEXT(TODAY(),"MMMM");

textFormat = "MMMM";

char[] formats = { 'M', 'D', 'Y', 'S', 'T' };

Condition	Framework 4.6	.NET50
`textFormat.IndexofAny(formats)`	-1	0

Can someone help me with the exact reason and solution?

[I cannot reproduce this.](https://dotnetfiddle.net/UO3fzL) Can you copy/paste a compliable repro? — Matthew Watson, Sep 13 '21 at 07:46

score 2 · Answer 1 · answered Sep 13 '21 at 07:01

2

In the docs, they have a site about the topic.

Behavior changes when comparing strings on .NET 5+

answered Sep 13 '21 at 07:01

Alex Fischer

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@priya-nandhini If this answer satisfies your question, please mark it as Accepted by clicking the check mark in the top left. :) – Alex Fischer Sep 13 '21 at 08:51
I agree. This is the best answer for the question. – Eriawan Kusumawardhono Sep 14 '21 at 13:53

Why String.IndexofAny() is working differently in Framework 4.6 from .NET50

1 Answers1